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        <a href="../.." >Math 对象</a>
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                                <h1 id="math-&#x5BF9;&#x8C61;">Math &#x5BF9;&#x8C61;</h1>
<p><code>Math</code>&#x662F; JavaScript &#x7684;&#x539F;&#x751F;&#x5BF9;&#x8C61;&#xFF0C;&#x63D0;&#x4F9B;&#x5404;&#x79CD;&#x6570;&#x5B66;&#x529F;&#x80FD;&#x3002;&#x8BE5;&#x5BF9;&#x8C61;&#x4E0D;&#x662F;&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x4E0D;&#x80FD;&#x751F;&#x6210;&#x5B9E;&#x4F8B;&#xFF0C;&#x6240;&#x6709;&#x7684;&#x5C5E;&#x6027;&#x548C;&#x65B9;&#x6CD5;&#x90FD;&#x5FC5;&#x987B;&#x5728;<code>Math</code>&#x5BF9;&#x8C61;&#x4E0A;&#x8C03;&#x7528;&#x3002;</p>
<h2 id="&#x9759;&#x6001;&#x5C5E;&#x6027;">&#x9759;&#x6001;&#x5C5E;&#x6027;</h2>
<p><code>Math</code>&#x5BF9;&#x8C61;&#x7684;&#x9759;&#x6001;&#x5C5E;&#x6027;&#xFF0C;&#x63D0;&#x4F9B;&#x4EE5;&#x4E0B;&#x4E00;&#x4E9B;&#x6570;&#x5B66;&#x5E38;&#x6570;&#x3002;</p>
<ul>
<li><code>Math.E</code>&#xFF1A;&#x5E38;&#x6570;<code>e</code>&#x3002;</li>
<li><code>Math.LN2</code>&#xFF1A;2 &#x7684;&#x81EA;&#x7136;&#x5BF9;&#x6570;&#x3002;</li>
<li><code>Math.LN10</code>&#xFF1A;10 &#x7684;&#x81EA;&#x7136;&#x5BF9;&#x6570;&#x3002;</li>
<li><code>Math.LOG2E</code>&#xFF1A;&#x4EE5; 2 &#x4E3A;&#x5E95;&#x7684;<code>e</code>&#x7684;&#x5BF9;&#x6570;&#x3002;</li>
<li><code>Math.LOG10E</code>&#xFF1A;&#x4EE5; 10 &#x4E3A;&#x5E95;&#x7684;<code>e</code>&#x7684;&#x5BF9;&#x6570;&#x3002;</li>
<li><code>Math.PI</code>&#xFF1A;&#x5E38;&#x6570;<code>&#x3C0;</code>&#x3002;</li>
<li><code>Math.SQRT1_2</code>&#xFF1A;0.5 &#x7684;&#x5E73;&#x65B9;&#x6839;&#x3002;</li>
<li><code>Math.SQRT2</code>&#xFF1A;2 &#x7684;&#x5E73;&#x65B9;&#x6839;&#x3002;</li>
</ul>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.E <span class="hljs-comment">// 2.718281828459045</span>
<span class="hljs-built_in">Math</span>.LN2 <span class="hljs-comment">// 0.6931471805599453</span>
<span class="hljs-built_in">Math</span>.LN10 <span class="hljs-comment">// 2.302585092994046</span>
<span class="hljs-built_in">Math</span>.LOG2E <span class="hljs-comment">// 1.4426950408889634</span>
<span class="hljs-built_in">Math</span>.LOG10E <span class="hljs-comment">// 0.4342944819032518</span>
<span class="hljs-built_in">Math</span>.PI <span class="hljs-comment">// 3.141592653589793</span>
<span class="hljs-built_in">Math</span>.SQRT1_2 <span class="hljs-comment">// 0.7071067811865476</span>
<span class="hljs-built_in">Math</span>.SQRT2 <span class="hljs-comment">// 1.4142135623730951</span>
</code></pre>
<p>&#x8FD9;&#x4E9B;&#x5C5E;&#x6027;&#x90FD;&#x662F;&#x53EA;&#x8BFB;&#x7684;&#xFF0C;&#x4E0D;&#x80FD;&#x4FEE;&#x6539;&#x3002;</p>
<h2 id="&#x9759;&#x6001;&#x65B9;&#x6CD5;">&#x9759;&#x6001;&#x65B9;&#x6CD5;</h2>
<p><code>Math</code>&#x5BF9;&#x8C61;&#x63D0;&#x4F9B;&#x4EE5;&#x4E0B;&#x4E00;&#x4E9B;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x3002;</p>
<ul>
<li><code>Math.abs()</code>&#xFF1A;&#x7EDD;&#x5BF9;&#x503C;</li>
<li><code>Math.ceil()</code>&#xFF1A;&#x5411;&#x4E0A;&#x53D6;&#x6574;</li>
<li><code>Math.floor()</code>&#xFF1A;&#x5411;&#x4E0B;&#x53D6;&#x6574;</li>
<li><code>Math.max()</code>&#xFF1A;&#x6700;&#x5927;&#x503C;</li>
<li><code>Math.min()</code>&#xFF1A;&#x6700;&#x5C0F;&#x503C;</li>
<li><code>Math.pow()</code>&#xFF1A;&#x6307;&#x6570;&#x8FD0;&#x7B97;</li>
<li><code>Math.sqrt()</code>&#xFF1A;&#x5E73;&#x65B9;&#x6839;</li>
<li><code>Math.log()</code>&#xFF1A;&#x81EA;&#x7136;&#x5BF9;&#x6570;</li>
<li><code>Math.exp()</code>&#xFF1A;<code>e</code>&#x7684;&#x6307;&#x6570;</li>
<li><code>Math.round()</code>&#xFF1A;&#x56DB;&#x820D;&#x4E94;&#x5165;</li>
<li><code>Math.random()</code>&#xFF1A;&#x968F;&#x673A;&#x6570;</li>
</ul>
<h3 id="mathabs">Math.abs()</h3>
<p><code>Math.abs</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x503C;&#x7684;&#x7EDD;&#x5BF9;&#x503C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.abs(<span class="hljs-number">1</span>) <span class="hljs-comment">// 1</span>
<span class="hljs-built_in">Math</span>.abs(<span class="hljs-number">-1</span>) <span class="hljs-comment">// 1</span>
</code></pre>
<h3 id="mathmax&#xFF0C;mathmin">Math.max()&#xFF0C;Math.min()</h3>
<p><code>Math.max</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x4E4B;&#x4E2D;&#x6700;&#x5927;&#x7684;&#x90A3;&#x4E2A;&#x503C;&#xFF0C;<code>Math.min</code>&#x8FD4;&#x56DE;&#x6700;&#x5C0F;&#x7684;&#x90A3;&#x4E2A;&#x503C;&#x3002;&#x5982;&#x679C;&#x53C2;&#x6570;&#x4E3A;&#x7A7A;, <code>Math.min</code>&#x8FD4;&#x56DE;<code>Infinity</code>, <code>Math.max</code>&#x8FD4;&#x56DE;<code>-Infinity</code>&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.max(<span class="hljs-number">2</span>, <span class="hljs-number">-1</span>, <span class="hljs-number">5</span>) <span class="hljs-comment">// 5</span>
<span class="hljs-built_in">Math</span>.min(<span class="hljs-number">2</span>, <span class="hljs-number">-1</span>, <span class="hljs-number">5</span>) <span class="hljs-comment">// -1</span>
<span class="hljs-built_in">Math</span>.min() <span class="hljs-comment">// Infinity</span>
<span class="hljs-built_in">Math</span>.max() <span class="hljs-comment">// -Infinity</span>
</code></pre>
<h3 id="mathfloor&#xFF0C;mathceil">Math.floor()&#xFF0C;Math.ceil()</h3>
<p><code>Math.floor</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x5C0F;&#x4E8E;&#x53C2;&#x6570;&#x503C;&#x7684;&#x6700;&#x5927;&#x6574;&#x6570;&#xFF08;&#x5730;&#x677F;&#x503C;&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.floor(<span class="hljs-number">3.2</span>) <span class="hljs-comment">// 3</span>
<span class="hljs-built_in">Math</span>.floor(<span class="hljs-number">-3.2</span>) <span class="hljs-comment">// -4</span>
</code></pre>
<p><code>Math.ceil</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x5927;&#x4E8E;&#x53C2;&#x6570;&#x503C;&#x7684;&#x6700;&#x5C0F;&#x6574;&#x6570;&#xFF08;&#x5929;&#x82B1;&#x677F;&#x503C;&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.ceil(<span class="hljs-number">3.2</span>) <span class="hljs-comment">// 4</span>
<span class="hljs-built_in">Math</span>.ceil(<span class="hljs-number">-3.2</span>) <span class="hljs-comment">// -3</span>
</code></pre>
<p>&#x8FD9;&#x4E24;&#x4E2A;&#x65B9;&#x6CD5;&#x53EF;&#x4EE5;&#x7ED3;&#x5408;&#x8D77;&#x6765;&#xFF0C;&#x5B9E;&#x73B0;&#x4E00;&#x4E2A;&#x603B;&#x662F;&#x8FD4;&#x56DE;&#x6570;&#x503C;&#x7684;&#x6574;&#x6570;&#x90E8;&#x5206;&#x7684;&#x51FD;&#x6570;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">ToInteger</span>(<span class="hljs-params">x</span>) </span>{
  x = <span class="hljs-built_in">Number</span>(x);
  <span class="hljs-keyword">return</span> x &lt; <span class="hljs-number">0</span> ? <span class="hljs-built_in">Math</span>.ceil(x) : <span class="hljs-built_in">Math</span>.floor(x);
}

ToInteger(<span class="hljs-number">3.2</span>) <span class="hljs-comment">// 3</span>
ToInteger(<span class="hljs-number">3.5</span>) <span class="hljs-comment">// 3</span>
ToInteger(<span class="hljs-number">3.8</span>) <span class="hljs-comment">// 3</span>
ToInteger(<span class="hljs-number">-3.2</span>) <span class="hljs-comment">// -3</span>
ToInteger(<span class="hljs-number">-3.5</span>) <span class="hljs-comment">// -3</span>
ToInteger(<span class="hljs-number">-3.8</span>) <span class="hljs-comment">// -3</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x4E0D;&#x7BA1;&#x6B63;&#x6570;&#x6216;&#x8D1F;&#x6570;&#xFF0C;<code>ToInteger</code>&#x51FD;&#x6570;&#x603B;&#x662F;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x6570;&#x503C;&#x7684;&#x6574;&#x6570;&#x90E8;&#x5206;&#x3002;</p>
<h3 id="mathround">Math.round()</h3>
<p><code>Math.round</code>&#x65B9;&#x6CD5;&#x7528;&#x4E8E;&#x56DB;&#x820D;&#x4E94;&#x5165;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.round(<span class="hljs-number">0.1</span>) <span class="hljs-comment">// 0</span>
<span class="hljs-built_in">Math</span>.round(<span class="hljs-number">0.5</span>) <span class="hljs-comment">// 1</span>
<span class="hljs-built_in">Math</span>.round(<span class="hljs-number">0.6</span>) <span class="hljs-comment">// 1</span>

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E;</span>
<span class="hljs-built_in">Math</span>.floor(x + <span class="hljs-number">0.5</span>)
</code></pre>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x5B83;&#x5BF9;&#x8D1F;&#x6570;&#x7684;&#x5904;&#x7406;&#xFF08;&#x4E3B;&#x8981;&#x662F;&#x5BF9;<code>0.5</code>&#x7684;&#x5904;&#x7406;&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.round(<span class="hljs-number">-1.1</span>) <span class="hljs-comment">// -1</span>
<span class="hljs-built_in">Math</span>.round(<span class="hljs-number">-1.5</span>) <span class="hljs-comment">// -1</span>
<span class="hljs-built_in">Math</span>.round(<span class="hljs-number">-1.6</span>) <span class="hljs-comment">// -2</span>
</code></pre>
<h3 id="mathpow">Math.pow()</h3>
<p><code>Math.pow</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x4EE5;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x5E95;&#x6570;&#x3001;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x4E3A;&#x5E42;&#x7684;&#x6307;&#x6570;&#x503C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; 2 ** 2</span>
<span class="hljs-built_in">Math</span>.pow(<span class="hljs-number">2</span>, <span class="hljs-number">2</span>) <span class="hljs-comment">// 4</span>
<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; 2 ** 3</span>
<span class="hljs-built_in">Math</span>.pow(<span class="hljs-number">2</span>, <span class="hljs-number">3</span>) <span class="hljs-comment">// 8</span>
</code></pre>
<p>&#x4E0B;&#x9762;&#x662F;&#x8BA1;&#x7B97;&#x5706;&#x9762;&#x79EF;&#x7684;&#x65B9;&#x6CD5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> radius = <span class="hljs-number">20</span>;
<span class="hljs-keyword">var</span> area = <span class="hljs-built_in">Math</span>.PI * <span class="hljs-built_in">Math</span>.pow(radius, <span class="hljs-number">2</span>);
</code></pre>
<h3 id="mathsqrt">Math.sqrt()</h3>
<p><code>Math.sqrt</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x503C;&#x7684;&#x5E73;&#x65B9;&#x6839;&#x3002;&#x5982;&#x679C;&#x53C2;&#x6570;&#x662F;&#x4E00;&#x4E2A;&#x8D1F;&#x503C;&#xFF0C;&#x5219;&#x8FD4;&#x56DE;<code>NaN</code>&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.sqrt(<span class="hljs-number">4</span>) <span class="hljs-comment">// 2</span>
<span class="hljs-built_in">Math</span>.sqrt(<span class="hljs-number">-4</span>) <span class="hljs-comment">// NaN</span>
</code></pre>
<h3 id="mathlog">Math.log()</h3>
<p><code>Math.log</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x4EE5;<code>e</code>&#x4E3A;&#x5E95;&#x7684;&#x81EA;&#x7136;&#x5BF9;&#x6570;&#x503C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.log(<span class="hljs-built_in">Math</span>.E) <span class="hljs-comment">// 1</span>
<span class="hljs-built_in">Math</span>.log(<span class="hljs-number">10</span>) <span class="hljs-comment">// 2.302585092994046</span>
</code></pre>
<p>&#x5982;&#x679C;&#x8981;&#x8BA1;&#x7B97;&#x4EE5;10&#x4E3A;&#x5E95;&#x7684;&#x5BF9;&#x6570;&#xFF0C;&#x53EF;&#x4EE5;&#x5148;&#x7528;<code>Math.log</code>&#x6C42;&#x51FA;&#x81EA;&#x7136;&#x5BF9;&#x6570;&#xFF0C;&#x7136;&#x540E;&#x9664;&#x4EE5;<code>Math.LN10</code>&#xFF1B;&#x6C42;&#x4EE5;2&#x4E3A;&#x5E95;&#x7684;&#x5BF9;&#x6570;&#xFF0C;&#x53EF;&#x4EE5;&#x9664;&#x4EE5;<code>Math.LN2</code>&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.log(<span class="hljs-number">100</span>)/<span class="hljs-built_in">Math</span>.LN10 <span class="hljs-comment">// 2</span>
<span class="hljs-built_in">Math</span>.log(<span class="hljs-number">8</span>)/<span class="hljs-built_in">Math</span>.LN2 <span class="hljs-comment">// 3</span>
</code></pre>
<h3 id="mathexp">Math.exp()</h3>
<p><code>Math.exp</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x5E38;&#x6570;<code>e</code>&#x7684;&#x53C2;&#x6570;&#x6B21;&#x65B9;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.exp(<span class="hljs-number">1</span>) <span class="hljs-comment">// 2.718281828459045</span>
<span class="hljs-built_in">Math</span>.exp(<span class="hljs-number">3</span>) <span class="hljs-comment">// 20.085536923187668</span>
</code></pre>
<h3 id="mathrandom">Math.random()</h3>
<p><code>Math.random()</code>&#x8FD4;&#x56DE;0&#x5230;1&#x4E4B;&#x95F4;&#x7684;&#x4E00;&#x4E2A;&#x4F2A;&#x968F;&#x673A;&#x6570;&#xFF0C;&#x53EF;&#x80FD;&#x7B49;&#x4E8E;0&#xFF0C;&#x4F46;&#x662F;&#x4E00;&#x5B9A;&#x5C0F;&#x4E8E;1&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.random() <span class="hljs-comment">// 0.7151307314634323</span>
</code></pre>
<p>&#x4EFB;&#x610F;&#x8303;&#x56F4;&#x7684;&#x968F;&#x673A;&#x6570;&#x751F;&#x6210;&#x51FD;&#x6570;&#x5982;&#x4E0B;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">getRandomArbitrary</span>(<span class="hljs-params">min, max</span>) </span>{
  <span class="hljs-keyword">return</span> <span class="hljs-built_in">Math</span>.random() * (max - min) + min;
}

getRandomArbitrary(<span class="hljs-number">1.5</span>, <span class="hljs-number">6.5</span>)
<span class="hljs-comment">// 2.4942810038223864</span>
</code></pre>
<p>&#x4EFB;&#x610F;&#x8303;&#x56F4;&#x7684;&#x968F;&#x673A;&#x6574;&#x6570;&#x751F;&#x6210;&#x51FD;&#x6570;&#x5982;&#x4E0B;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">getRandomInt</span>(<span class="hljs-params">min, max</span>) </span>{
  <span class="hljs-keyword">return</span> <span class="hljs-built_in">Math</span>.floor(<span class="hljs-built_in">Math</span>.random() * (max - min + <span class="hljs-number">1</span>)) + min;
}

getRandomInt(<span class="hljs-number">1</span>, <span class="hljs-number">6</span>) <span class="hljs-comment">// 5</span>
</code></pre>
<p>&#x8FD4;&#x56DE;&#x968F;&#x673A;&#x5B57;&#x7B26;&#x7684;&#x4F8B;&#x5B50;&#x5982;&#x4E0B;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">random_str</span>(<span class="hljs-params">length</span>) </span>{
  <span class="hljs-keyword">var</span> ALPHABET = <span class="hljs-string">&apos;ABCDEFGHIJKLMNOPQRSTUVWXYZ&apos;</span>;
  ALPHABET += <span class="hljs-string">&apos;abcdefghijklmnopqrstuvwxyz&apos;</span>;
  ALPHABET += <span class="hljs-string">&apos;0123456789-_&apos;</span>;
  <span class="hljs-keyword">var</span> str = <span class="hljs-string">&apos;&apos;</span>;
  <span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> i = <span class="hljs-number">0</span>; i &lt; length; ++i) {
    <span class="hljs-keyword">var</span> rand = <span class="hljs-built_in">Math</span>.floor(<span class="hljs-built_in">Math</span>.random() * ALPHABET.length);
    str += ALPHABET.substring(rand, rand + <span class="hljs-number">1</span>);
  }
  <span class="hljs-keyword">return</span> str;
}

random_str(<span class="hljs-number">6</span>) <span class="hljs-comment">// &quot;NdQKOr&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>random_str</code>&#x51FD;&#x6570;&#x63A5;&#x53D7;&#x4E00;&#x4E2A;&#x6574;&#x6570;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#xFF0C;&#x8FD4;&#x56DE;&#x53D8;&#x91CF;<code>ALPHABET</code>&#x5185;&#x7684;&#x968F;&#x673A;&#x5B57;&#x7B26;&#x6240;&#x7EC4;&#x6210;&#x7684;&#x6307;&#x5B9A;&#x957F;&#x5EA6;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x3002;</p>
<h3 id="&#x4E09;&#x89D2;&#x51FD;&#x6570;&#x65B9;&#x6CD5;">&#x4E09;&#x89D2;&#x51FD;&#x6570;&#x65B9;&#x6CD5;</h3>
<p><code>Math</code>&#x5BF9;&#x8C61;&#x8FD8;&#x63D0;&#x4F9B;&#x4E00;&#x7CFB;&#x5217;&#x4E09;&#x89D2;&#x51FD;&#x6570;&#x65B9;&#x6CD5;&#x3002;</p>
<ul>
<li><code>Math.sin()</code>&#xFF1A;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x7684;&#x6B63;&#x5F26;&#xFF08;&#x53C2;&#x6570;&#x4E3A;&#x5F27;&#x5EA6;&#x503C;&#xFF09;</li>
<li><code>Math.cos()</code>&#xFF1A;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x7684;&#x4F59;&#x5F26;&#xFF08;&#x53C2;&#x6570;&#x4E3A;&#x5F27;&#x5EA6;&#x503C;&#xFF09;</li>
<li><code>Math.tan()</code>&#xFF1A;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x7684;&#x6B63;&#x5207;&#xFF08;&#x53C2;&#x6570;&#x4E3A;&#x5F27;&#x5EA6;&#x503C;&#xFF09;</li>
<li><code>Math.asin()</code>&#xFF1A;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x7684;&#x53CD;&#x6B63;&#x5F26;&#xFF08;&#x8FD4;&#x56DE;&#x503C;&#x4E3A;&#x5F27;&#x5EA6;&#x503C;&#xFF09;</li>
<li><code>Math.acos()</code>&#xFF1A;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x7684;&#x53CD;&#x4F59;&#x5F26;&#xFF08;&#x8FD4;&#x56DE;&#x503C;&#x4E3A;&#x5F27;&#x5EA6;&#x503C;&#xFF09;</li>
<li><code>Math.atan()</code>&#xFF1A;&#x8FD4;&#x56DE;&#x53C2;&#x6570;&#x7684;&#x53CD;&#x6B63;&#x5207;&#xFF08;&#x8FD4;&#x56DE;&#x503C;&#x4E3A;&#x5F27;&#x5EA6;&#x503C;&#xFF09;</li>
</ul>
<pre><code class="lang-javascript"><span class="hljs-built_in">Math</span>.sin(<span class="hljs-number">0</span>) <span class="hljs-comment">// 0</span>
<span class="hljs-built_in">Math</span>.cos(<span class="hljs-number">0</span>) <span class="hljs-comment">// 1</span>
<span class="hljs-built_in">Math</span>.tan(<span class="hljs-number">0</span>) <span class="hljs-comment">// 0</span>

<span class="hljs-built_in">Math</span>.sin(<span class="hljs-built_in">Math</span>.PI / <span class="hljs-number">2</span>) <span class="hljs-comment">// 1</span>

<span class="hljs-built_in">Math</span>.asin(<span class="hljs-number">1</span>) <span class="hljs-comment">// 1.5707963267948966</span>
<span class="hljs-built_in">Math</span>.acos(<span class="hljs-number">1</span>) <span class="hljs-comment">// 0</span>
<span class="hljs-built_in">Math</span>.atan(<span class="hljs-number">1</span>) <span class="hljs-comment">// 0.7853981633974483</span>
</code></pre>




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